Namespacing with modules in Ruby - Mini Project: Build & Apply

Namespacing with modules

📖 Scenario: Imagine you are organizing a small library system. You want to keep book-related and author-related code separate but still inside the same program. This helps avoid confusion when different parts have similar names.

🎯 Goal: You will create two modules named Books and Authors. Each module will have a class with the same name Info but with different details. Then you will print information from both classes to see how modules keep them separate.

📋 What You'll Learn

Create a module called Books with a class Info inside it

Create a module called Authors with a class Info inside it

Each Info class should have a method details that returns a string

Use the full namespaced class names to create objects and call details

Print the results from both Books::Info and Authors::Info

💡 Why This Matters

🌍 Real World

Namespacing with modules is useful when building large programs or libraries where different parts might have classes or methods with the same names.

💼 Career

Understanding modules and namespacing is important for writing clean, maintainable Ruby code and working on team projects or open-source libraries.

1

Create the Books module with Info class

Create a module called Books. Inside it, define a class called Info. Add a method details that returns the string "Book: Ruby Programming".

Ruby

# Your code here

Need a hint?

Use module Books to start the module. Inside it, define class Info and a method details that returns the exact string.

2

Create the Authors module with Info class

Add a new module called Authors. Inside it, define a class called Info. Add a method details that returns the string "Author: Jane Doe".

Ruby

module Books
  class Info
    def details
      "Book: Ruby Programming"
    end
  end
end

# Your code here

Need a hint?

Similar to step 1, create module Authors with class Info and a details method returning the exact string.

3

Create objects using namespaced classes

Create a variable book_info and assign it an object of Books::Info.new. Create another variable author_info and assign it an object of Authors::Info.new.

Ruby

module Books
  class Info
    def details
      "Book: Ruby Programming"
    end
  end
end

module Authors
  class Info
    def details
      "Author: Jane Doe"
    end
  end
end

# Your code here

Need a hint?

Use the full namespaced class names with :: to create new objects and assign them to the variables.

4

Print details from both objects

Use puts to print the result of calling details on book_info and then on author_info.

Ruby

module Books
  class Info
    def details
      "Book: Ruby Programming"
    end
  end
end

module Authors
  class Info
    def details
      "Author: Jane Doe"
    end
  end
end

book_info = Books::Info.new
author_info = Authors::Info.new

# Your code here

Need a hint?

Use puts book_info.details and puts author_info.details to print the strings returned by the methods.